package com.sky.service.impl;

import com.fasterxml.jackson.databind.util.BeanUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper flavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    /*
    * 新增菜品和口味
    * @param dishDTO
    * */
    @Transactional
    public void saveWhithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表插入1条数据
        dishMapper.insert(dish);
        //获取插入的菜品id
        Long dishId = dish.getId();

        //向口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null &&  flavors.size() > 0) {
            flavors.forEach(flavor -> {
                flavor.setDishId(dishId);
            });
            //批量插入菜品口味
            flavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //分页查询
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 菜品批量删除
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断是否有起售菜品
        for (Long id : ids) {
            //根据id查询菜品
            Dish dish = dishMapper.getById(id);
            //判断菜品是否为起售状态
            if(dish.getStatus() == StatusConstant.ENABLE) {
                //起售状态，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断是否有关联的套餐
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0) {
            //有关联的套餐，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }


        /*for (Long id : ids) {
            //删除菜品
            dishMapper.deleteById(id);
            //删除菜品口味
            flavorMapper.deleteByDishId(id);
        }*/
        //删除菜品
        dishMapper.deleteByIds(ids);
        //删除菜品口味
        flavorMapper.deleteByDishIds(ids);
    }

    /**
     * 根据id查询菜品和口味
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish = dishMapper.getById(id);
        //查询口味
        List<DishFlavor> dishFlavor = dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavor);
        return dishVO;
    }

    /*
     * 根据id修改菜品基本信息和口味
     * @param dishDTO
     * */
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //修改菜品表基本信息
        dishMapper.update(dish);
        //删除原有口味
        dishFlavorMapper.deleteByDishIds(List.of(dishDTO.getId()));

        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(flavor -> {
                flavor.setDishId(dish.getId());
            });
        }
        //向口味表插入n条数据
        dishFlavorMapper.insertBatch(flavors);

    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}
